Android下PreferenceActivity使用示例的代码

如下资料是关于Android下PreferenceActivity使用示例的代码，希望对小伙伴有一些用途。

package cn.testpreferenceactivity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceChangeListener; import android.preference.Preference.OnPreferenceClickListener;
import android.preference.PreferenceActivity;
import android.preference.PreferenceManager;
public class MainActivity extends PreferenceActivity {
private CheckBoxPreference mCheckBoxPreference;
private ListPreference mListPreference;
@Override
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.preferenceactivity);
init(); }
private void init(){
mCheckBoxPreference= (CheckBoxPreference) findPreference(getResources().getString(R.string.first_key)); mCheckBoxPreference.setOnPreferenceChangeListener(new PreferenceChangeListenerImpl()); mCheckBoxPreference.setOnPreferenceClickListener(new PreferenceClickListenerImpl());

	mListPreference=
    (ListPreference) findPreference(getResources().getString(R.string.listpreference_key));
	mListPreference.setOnPreferenceChangeListener(new PreferenceChangeListenerImpl());
	mListPreference.setOnPreferenceClickListener(new PreferenceClickListenerImpl());
}

private class PreferenceClickListenerImpl implements OnPreferenceClickListener{
	@Override
	public boolean onPreferenceClick(Preference preference) {
		String preferenceKey=preference.getKey().toString();
		if (preferenceKey.equals(getResources().getString(R.string.first_key))) {
			System.out.println("点击了CheckBoxPreference");
		}
		if (preferenceKey.equals(getResources().getString(R.string.listpreference_key))) {
			System.out.println("点击了ListPreference");
		}
		return true;
	}
}

private class  PreferenceChangeListenerImpl implements OnPreferenceChangeListener{
	@Override
	public boolean onPreferenceChange(Preference preference, Object newValue) {
		String preferenceKey=preference.getKey().toString();
		if (preferenceKey.equals(getResources().getString(R.string.first_key))) {
			System.out.println("切换后值为:"+newValue.toString());
		}
		if (preferenceKey.equals(getResources().getString(R.string.listpreference_key))) {
			System.out.println("切换后值为:"+newValue.toString());
		}
		return true;
	}
	
}

@Override
public void onBackPressed() {
	getValuesFromSP();
	super.onBackPressed();
}

private void getValuesFromSP(){
	SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(MainActivity.this);
	Boolean first_value = sp.getBoolean(getResources().getString(R.string.first_key), false);
	String listpreference_key = sp.getString(getResources().getString(R.string.listpreference_key), null);
	System.out.println("从SharedPreferences中取出的是:" + first_value);
	System.out.println("从SharedPreferences中取出的是:" + listpreference_key);
}

}

preferenceactivity.xml如下:

<CheckBoxPreference
    android:key="@string/first_key"
    android:summary="@string/first_default"
    android:summaryOff="@string/first_off"
    android:summaryOn="@string/first_on"
    android:title="@string/first_title" 
/>

<ListPreference
    android:dialogIcon="@drawable/ic_launcher"
    android:dialogTitle="@string/listpreference_title"
    android:entries="@array/names_array"
    android:entryValues="@array/values_array"
    android:key="@string/listpreference_key"
    android:negativeButtonText="@string/listpreference_no"
    android:summary="@string/listpreference_summary"
    android:title="@string/listpreference_title"
    android:defaultValue="222"
/>

strings.xml如下:

<string name="app_name">TestPreferenceActivity</string>
<string name="action_settings">Settings</string>
<string name="hello_world">Hello world!</string>

<string name="first_key">first_key</string>
<string name="first_on">first_on</string>
<string name="first_off">first_off</string>
<string name="first_title">first_title</string>
<string name="first_default">first_default</string>

<string name="listpreference_key">listpreference_key</string>
<string name="listpreference_title">listpreference_title</string>
<string name="listpreference_summary">listpreference_summary</string>
<string name="listpreference_message">listpreference_message</string>
<string name="listpreference_ok">OK</string>
<string name="listpreference_no">NO</string>